Subaru Impreza BOV Supersonic VTA Blow Off Dump Valve 01-11 WRX STI DIRECT FITSpecifically
designed for the Subaru boxer' blow-off valve is a direct fit onto the
Impreza intercooler where the existing OEM re-circulating valve is
located. The Blow-Off valve (BOV) is a pressure relief device on the
intake tract to prevent the turbo's compressor from going into surge.
When the throttle is c ...

Subaru Impreza Direct Fit 'Vent to Atmosphere' Dump Valve - SILVERSpecifically designed for the Subaru boxer' blow-off valve is a direct fit onto the Impreza intercooler where the existing OEM re-circulating valve is located. The Blow-Off valve (BOV) is a pressure relief device on the intake tract to prevent the turbo's compressor from going into surge. When the throttle is closed rapidly, the air ...